EP3599806B1 - Method for mounting an electrical component on a base part - Google Patents
Method for mounting an electrical component on a base part Download PDFInfo
- Publication number
- EP3599806B1 EP3599806B1 EP19183152.8A EP19183152A EP3599806B1 EP 3599806 B1 EP3599806 B1 EP 3599806B1 EP 19183152 A EP19183152 A EP 19183152A EP 3599806 B1 EP3599806 B1 EP 3599806B1
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- EP
- European Patent Office
- Prior art keywords
- wedge
- base part
- electrical component
- wedge element
- accordance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000000034 method Methods 0.000 title claims description 15
- 239000004020 conductor Substances 0.000 claims description 15
- 239000002184 metal Substances 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 230000010512 thermal transition Effects 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000002655 kraft paper Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000005693 optoelectronics Effects 0.000 description 2
- 238000000098 azimuthal photoelectron diffraction Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/02—Details
- H01L31/024—Arrangements for cooling, heating, ventilating or temperature compensation
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2039—Modifications to facilitate cooling, ventilating, or heating characterised by the heat transfer by conduction from the heat generating element to a dissipating body
- H05K7/20436—Inner thermal coupling elements in heat dissipating housings, e.g. protrusions or depressions integrally formed in the housing
- H05K7/2049—Pressing means used to urge contact, e.g. springs
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/12—Mountings, e.g. non-detachable insulating substrates
- H01L23/13—Mountings, e.g. non-detachable insulating substrates characterised by the shape
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
- H01L23/40—Mountings or securing means for detachable cooling or heating arrangements ; fixed by friction, plugs or springs
- H01L23/4006—Mountings or securing means for detachable cooling or heating arrangements ; fixed by friction, plugs or springs with bolts or screws
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/02—Details
- H01L31/0203—Containers; Encapsulations, e.g. encapsulation of photodiodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2039—Modifications to facilitate cooling, ventilating, or heating characterised by the heat transfer by conduction from the heat generating element to a dissipating body
- H05K7/20436—Inner thermal coupling elements in heat dissipating housings, e.g. protrusions or depressions integrally formed in the housing
- H05K7/20445—Inner thermal coupling elements in heat dissipating housings, e.g. protrusions or depressions integrally formed in the housing the coupling element being an additional piece, e.g. thermal standoff
Definitions
- the invention relates to a method for mounting an electrical component on a base part according to the preamble of claim 1.
- the thermal connection of electrical components is an important aspect that must be taken into account when designing and manufacturing a sensor in order to guarantee its function. If possible, the electrical consumers are connected directly to the sensor housing in order to keep the self-heating of the device as low as possible. If the device temperature increases, there is a risk of a loss in the efficiency of optoelectronic components such as lasers or LEDs, a deterioration in the signal-to-noise ratio of light receivers and image sensors, and a shortened service life. In addition, the electrical components must be operated in the specified temperature range.
- a conventional way of dealing with such tolerances is individual treatment from device to device during assembly. To do this, the components are first assembled without heat transfer material, and the distance between the electrical component and the heat sink is measured. Then the components are disassembled again, the large tolerances are compensated for using a copper sheet selected on the basis of the measured distance, and a thin heat conducting foil is added before the components are then screwed together.
- the copper sheets are available in staggered thicknesses.
- the US 2017/0363371 A1 discloses a self-aligning cooling module having two wedges superposed with a solid thermal bond material therebetween.
- a spring presses laterally against one of the wedges, thereby jamming the two wedges while compensating for tolerances between an electronic component located above and a heat sink located below.
- This has some disadvantages: The indirect lateral force action by means of the spring impairs the thermal transition between the wedges, and the heat sink is constantly subjected to mechanical loads via the wedge lever. Because of the two wedges, the temperature flow from the electronic component to the heat sink has to overcome several interfaces. A spring with long-term stability is required which exerts a defined force over the entire service life.
- the DE 10 2007 049 0035 A1 discloses a chip cooling device having a wedge element between a surface of the chip to be cooled and a surface of the heat sink.
- the heat sink itself has an inclined heat sink surface which forms a wedge-shaped gap with the surface of the chip.
- the wedge element is held therein by a leaf spring which exerts sufficient pressure on the wedge element to prevent it from loosening.
- a wedge element is also pushed between the cooling device and a carrier of the electrical component, namely by a bimetallic strip which increases or decreases the mutual support surface depending on the temperature.
- the US 2014/0133093 A1 deals with a cooling system for an electronic component. It is packed in a wedge-shaped casing which is inserted into heat-conducting wedges which are complementary to the wedge shape. Depending on the embodiment, the shell is in this Position held by gravity or a lever closing from the base of the wedge.
- the DE 87 11 779 U1 describes a heat conductor for components in electrical communications engineering. Here, two opposing wedges are shifted between the heat sink and the component.
- connection uses a base and a locking wedge, which have a matching triangular cross-section.
- lock wedge When the lock wedge is axially displaced in the base, it is pushed upwards at the same time, so that the total height of the joint arrangement increases.
- the base part 10 has an inclined support surface, and a wedge element with a first wedge surface is arranged thereon. A lateral force is now exerted on this wedge element. The force acts from the narrow side of the wedge element, so that a force component allows the wedge element to move upwards on the support surface until a second wedge surface of the wedge element opposite the first wedge surface reaches a desired position.
- the electrical component is arranged on the second wedge surface.
- the wedge element moves on the incline until its top is at a desired height for contact with the electrical component.
- the wedge angle of the wedge element corresponds precisely to the angle of the inclined support surface so that the second wedge surface is oriented horizontally.
- the invention is based on the basic idea of making the tolerance compensation via the wedge element only once during assembly and then holding the position reached.
- the wedge element is fixed to the base part with at least one first fastening element, in particular with one or more screws.
- the lateral force is then no longer applied.
- the wedge element is held in the desired position by the first fastening element. Means for exerting a lateral force and finding a desired position are therefore only required during assembly and not afterwards.
- the invention has the advantage that mechanical tolerances for improved thermal connection of the electrical component are compensated for in a simple manner. It is not necessary to use thick heat conducting pads with poor thermal conductivity to compensate for tolerances, nor to select and insert a heat conducting sheet of specific thickness for each device. The heat flow through the one wedge element is good, and the fixation is long-term stable with the simplest fasteners such as screws.
- the electrical component preferably has a printed circuit board.
- the circuit board is equipped with one or more electrical components whose heat is to be dissipated.
- the mechanical tolerances to be compensated arise, for example, from the stacking of printed circuit boards.
- the base part is preferably designed as a housing part. This allows it to dissipate the heat directly to the outside.
- the base part is preferably at least thermally connected to a housing part.
- the wedge element comprises thermally conductive material.
- the base part preferably has a thermally conductive material.
- they are made in particular from metal.
- a good thermal bridge is created from the electrical component to the outside.
- the wedge element preferably rests directly on the base part. There are therefore no further components in between, in particular no heat conducting pad conventionally to be provided to compensate for tolerances. This is not necessary because the wedge element already fulfills its task by taking up the desired position.
- thermally conductive material is arranged between the electrical component and the second wedge surface. While the first wedge surface is fixed on the base part and a tight connection is ensured in this way, thermally conductive material at the interface between the wedge and electrical component can help to compensate for further tolerances, to further improve the thermal connection and to reduce mechanical loads on the possibly sensitive electrical component avoid.
- thermally conductive material at the interface between the wedge and electrical component can help to compensate for further tolerances, to further improve the thermal connection and to reduce mechanical loads on the possibly sensitive electrical component avoid.
- the first fastening element preferably forms a connection perpendicular to the support surface and the first wedge surface.
- a direct, vertical connection and application of force between the wedge element and the base part with a correspondingly good thermal transition is therefore ensured.
- the lateral force could not do that, it only has a partial component in this direction, which is essential during the lifetime of the installed device.
- a simple implementation possibility is a first fastening element which is itself vertically oriented, in particular a vertical screwing. A certain incline, for example for better accessibility with a tool, is still possible.
- the electrical component is preferably arranged on the base part in order to predetermine the desired position while the lateral force is being exerted.
- the electrical component itself which is brought into its target position, specifies the desired position of the wedge element.
- the lateral force presses it upwards, compensating for the tolerances, with the second wedge surface up to the underside of the electrical component or, if desired, of a heat-conducting material arranged in between.
- the wedge element is then fixed on the base part.
- the electrical component preferably has at least one opening through which the first fastening element is fixed.
- the wedge element can have lateral fastening areas which remain accessible for a tool for fixing the first fastening element.
- a template with a geometry corresponding to the electrical component is first arranged on the base part in front of the electrical component in order to predefine the desired position while the lateral force is being exerted.
- Certain mechanical loads damage the template during tolerance compensation with the lateral force and the fixation of the wedge element, which could affect an electrical component such as an assembled circuit board.
- the template can be designed such that there is easy access for fixing the first fastening element.
- the correspondence of the geometry of the template with that of the electrical component relates only to the areas that are relevant for the support on the second wedge surface and the attachment to the base part, so that otherwise there is freedom to provide openings and the like for tool access.
- the template is then preferably removed when the wedge element is fixed to the base part with the first fastening element.
- the electrical component is fixed, in particular screwed, to the base part with at least one second fastening element.
- the fitted electrical components now rest on the second wedge surface, as measured with the template, and so their waste heat is dissipated through the wedge element into the base part and further to the outside.
- the template can take into account a defined distance for a heat conducting pad or the like between the electrical component and the second wedge element.
- a method for producing a sensor in which at least one electrical component is mounted on at least one base part with one of the embodiments of the method according to the invention.
- the sensor is preferably an optoelectronic sensor, in particular a camera, which can be designed as a code reader.
- the electrical component can be a circuit board with a light source, a light receiver or image sensor and other electronic components for data exchange, supply or control or evaluation functions.
- Figure 1 shows a sectional view of a base part 10 of an electrical device, in particular a sensor.
- the base part 10 is preferably a housing part made of metal or another thermally conductive material, alternatively thermally connected to a housing or another heat sink.
- An electrical component is to be mounted on the base part 10 and cooled by a good thermal connection, for example a printed circuit board with components such as an FPGA, a microprocessor, a light source or a light receiver, such as one or more photodiodes or APDs (avalanche photodiode) or an image sensor .
- the base part 10 has an opening 12 for a first fastening element, with several openings 12 for several first fastening elements also being possible, depending on the dimensions. Furthermore, second fastening elements 14 are provided for the electrical component.
- the base part 10 On the top, where the electrical component is mounted, the base part 10 has an inclined support surface 16. In the case of a smooth, horizontal upper side, the electrical component would only be mounted thereon with great mechanical tolerance, which according to the invention is provided by the inclined support surface 16 and the others, below with reference to Figures 2 to 6 explained steps for mounting the electrical component is avoided.
- Figure 2 shows a further sectional view of the base part 10, in which a template 18 is placed on the base part 10.
- the second fastening elements 14 are used here for this purpose, but the template 18 could also be brought into its target position in a different way.
- the template 18 has, at least in the later support and fastening areas, the same geometry as the electrical component to be mounted, in this example an assembled circuit board.
- the ones on the circuit board Electronic components are represented on the template 18 by a material block 18a, which has the dimensions of the electronic components and possibly additionally a heat conducting material to be placed thereon.
- FIG. 11 shows a further sectional view in which a wedge element 20 made of metal or another thermally conductive material is now inserted laterally in such a way that its lower surface rests on the inclined support surface 16. From the narrow side of the wedge element 20, a defined lateral force F is exerted, through which the wedge element 20 moves so far into the space that the lower surface of the wedge element 20 continues to the inclined support surface 16 and the upper surface of the wedge element 20 to the Template 18 or the material block 18a is pressed.
- the template 18 thus specifies the desired position of the wedge element 20 and, in particular, the height of its upper surface at which it rests with tolerance compensation.
- Figure 4 shows a further sectional view in which the wedge element 20 is fixed to the base part 10 with a first fastening element 22.
- the first fastening element 22 is a screw that is screwed into the opening 12.
- the template 18 can be designed in such a way that tool access for fixing the first fastening element 22 is facilitated, for example through corresponding openings and cutouts which the electrical component may not have.
- the direct, vertical force action of the first fastening element 22 produces an ideal thermal transition between the base part 10 and the wedge element 20.
- the firm pressing on the contact surfaces also makes a conceivable thermal material between the base part 10 and the wedge element 20 unnecessary.
- Figure 5 shows a sectional view in which after fixing the wedge element 20 on the base part 10 in the desired position for tolerance compensation, the template 18 is removed again. In addition, the application of the side force is no longer necessary.
- FIG. 11 shows a sectional view in which the electrical component 24, in this case a printed circuit board equipped with an electronic component 24 a, assumes the position defined by the template 18.
- the electrical component 24 is fixed, in particular screwed, to the base part 10 with the aid of the second fastening elements 14.
- thermally conductive material 26 for example a temperature pad or a thermally conductive paste or both, such as a polyimide film with paste.
- thermally conductive material 26 can be taken into account in the material block 18a of the template 18.
- the electrical component 24 are placed directly on the base part 10. But then there must be a possibility of fixing the wedge element 20 with the first fastening element 22 on the base part 10 with the electrical component 24 resting on it.
- the accessibility can be created, for example, through openings in the electrical component 24 or the printed circuit board, through a protrusion of the wedge element 20 with the openings 12, or through a lateral deflection mechanism.
- the to the Figures 5 and 6 The steps described are omitted in this alternative embodiment; it can simply be in the state according to Figure 4 , but replaced with the template 18 by the electrical component 24, the exertion of the lateral force F can be stopped.
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Power Engineering (AREA)
- Electromagnetism (AREA)
- Thermal Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
- Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
Description
Die Erfindung betrifft ein Verfahren zum Montieren eines elektrischen Bauteils auf einem Sockelteil nach dem Oberbegriff von Anspruch 1.The invention relates to a method for mounting an electrical component on a base part according to the preamble of claim 1.
Die thermische Anbindung von elektrischen Bauteilen ist ein wichtiger Aspekt, der beim Design und bei der Herstellung eines Sensors beachtet werden muss, um dessen Funktion zu gewährleisten. Dabei werden nach Möglichkeit die elektrischen Verbraucher direkt mit dem Sensorgehäuse verbunden, um die Eigenerwärmung des Gerätes so gering wie möglich zu halten. Bei erhöhter Gerätetemperatur drohen Einbußen der Effizienz von optoelektrischen Bauteilen wie Lasern oder LEDs, eine Verschlechterung des Signal-Rausch-Verhältnisses bei Lichtempfängern und Bildsensoren sowie eine verkürzte Lebensdauer. Außerdem müssen die elektrischen Bauteile im spezifizierten Temperaturbereich betrieben werden.The thermal connection of electrical components is an important aspect that must be taken into account when designing and manufacturing a sensor in order to guarantee its function. If possible, the electrical consumers are connected directly to the sensor housing in order to keep the self-heating of the device as low as possible. If the device temperature increases, there is a risk of a loss in the efficiency of optoelectronic components such as lasers or LEDs, a deterioration in the signal-to-noise ratio of light receivers and image sensors, and a shortened service life. In addition, the electrical components must be operated in the specified temperature range.
Bei der Montage beziehungsweise dem Zusammenbauen treten mechanische Toleranzen auf. Damit besteht die zusätzliche Herausforderung, dass die Temperaturanbindung der elektrischen Bauteile durch solche Toleranzen möglichst nicht beeinträchtigt werden sollte.Mechanical tolerances occur during assembly or assembly. This poses the additional challenge that the temperature connection of the electrical components should not be impaired by such tolerances.
Eine herkömmliche Möglichkeit, mit solchen Toleranzen umzugehen, ist eine individuelle Behandlung von Gerät zu Gerät bei der Montage. Dazu werden die Komponenten zunächst ohne Wärmeübergangsmaterial zusammengebaut, und der Abstand zwischen elektrischem Bauteil und Wärmesenke wird vermessen. Dann werden die Komponenten wieder auseinandergebaut, über ein anhand des gemessenen Abstands ausgewähltes Kupferblech werden die großen Toleranzen ausgeglichen, und eine dünne Wärmeleitfolie wird ergänzt, ehe die Bauteile dann verschraubt werden. Die Kupferbleche liegen in gestaffelter Dicke vor. Ein solcher individueller Prozess ist sehr aufwändig und zudem fehleranfällig.A conventional way of dealing with such tolerances is individual treatment from device to device during assembly. To do this, the components are first assembled without heat transfer material, and the distance between the electrical component and the heat sink is measured. Then the components are disassembled again, the large tolerances are compensated for using a copper sheet selected on the basis of the measured distance, and a thin heat conducting foil is added before the components are then screwed together. The copper sheets are available in staggered thicknesses. Such an individual process is very complex and also prone to errors.
Eine andere Möglichkeit, um mechanische Toleranzen bei guter Wärmeanbindung auszugleichen, sind Wärmeleitrohre (Heatpipes), die aber ebenfalls mit relativ hohen Kosten verbunden sind.Another possibility to compensate for mechanical tolerances with a good thermal connection are heat pipes, but these are also associated with relatively high costs.
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Es ist daher Aufgabe der Erfindung, die Montage eines elektrischen Bauteils zu verbessern.It is therefore the object of the invention to improve the assembly of an electrical component.
Diese Aufgabe wird durch ein Verfahren zum Montieren eines elektrischen Bauteils auf einem Sockelteil nach Anspruch 1 sowie eine elektrische Vorrichtung nach Anspruch 10 gelöst. Das Sockelteil 10 hat eine schräge Auflagefläche, und darauf wird ein Keilelement mit einer ersten Keilfläche angeordnet. Auf dieses Keilelement wird nun eine seitliche Kraft ausgeübt. Die Kraft wirkt von der Schmalseite des Keilelements her, so dass eine Kraftkomponente das Keilelement sich auf der Auflagefläche nach oben bewegen lässt, bis eine der ersten Keilfläche gegenüberliegende zweite Keilfläche des Keilelements eine gewünschte Position erreicht. Das elektrische Bauteil wird auf der zweiten Keilfläche angeordnet. Anschaulich ausgedrückt bewegt sich das Keilelement so lange auf der Schräge, bis seine Oberseite auf einer gewünschten Höhe für den Kontakt mit der elektrischen Komponente liegt. Dazu entspricht vorzugsweise der Keilwinkel des Keilelements gerade dem Winkel der schrägen Auflagefläche, damit die zweite Keilfläche horizontal orientiert ist.This object is achieved by a method for mounting an electrical component on a base part according to claim 1 and an electrical device according to
Die Erfindung geht von dem Grundgedanken aus, den Toleranzausgleich über das Keilelement nur einmal während der Montage vorzunehmen und dann die erreichte Position festzuhalten. Dazu wird das Keilelement, wenn die zweite Keilfläche die gewünschte Position erreicht hat, mit mindestens einem ersten Befestigungselement an dem Sockelteil fixiert, insbesondere mit einer oder mehreren Schrauben. Anschließend wird die seitliche Kraft nicht mehr ausgeübt. Das Keilelement wird durch das erste Befestigungselement in der gewünschten Lage gehalten, Mittel zur seitlichen Krafteinwirkung mit Auffinden einer gewünschten Position sind deshalb nur während des Zusammenbaus erforderlich, danach nicht mehr.The invention is based on the basic idea of making the tolerance compensation via the wedge element only once during assembly and then holding the position reached. For this purpose, when the second wedge surface has reached the desired position, the wedge element is fixed to the base part with at least one first fastening element, in particular with one or more screws. The lateral force is then no longer applied. The wedge element is held in the desired position by the first fastening element. Means for exerting a lateral force and finding a desired position are therefore only required during assembly and not afterwards.
Die Erfindung hat den Vorteil, dass mechanische Toleranzen zur verbesserten thermischen Anbindung des elektrischen Bauteils auf einfache Weise ausgeglichen werden. Es ist weder erforderlich, zum Toleranzausgleich dicke Wärmeleitpads mit schlechtem thermischem Leitwert einzusetzen, noch individuell für jedes Gerät ein Wärmeleitblech spezifischer Dicke auszuwählen und einzulegen. Der Wärmefluss über das eine Keilelement ist gut, und die Fixierung ist mit einfachsten Befestigungsmitteln wie Schrauben langzeitstabil.The invention has the advantage that mechanical tolerances for improved thermal connection of the electrical component are compensated for in a simple manner. It is not necessary to use thick heat conducting pads with poor thermal conductivity to compensate for tolerances, nor to select and insert a heat conducting sheet of specific thickness for each device. The heat flow through the one wedge element is good, and the fixation is long-term stable with the simplest fasteners such as screws.
Das elektrische Bauteil weist bevorzugt eine Leiterplatte auf. Die Leiterplatte ist mit einem oder mehreren elektrischen Bauteilen bestückt, deren Wärme abgeführt werden soll. Die auszugleichenden mechanischen Toleranzen treten beispielsweise durch das Stapeln von Leiterplatten auf.The electrical component preferably has a printed circuit board. The circuit board is equipped with one or more electrical components whose heat is to be dissipated. The mechanical tolerances to be compensated arise, for example, from the stacking of printed circuit boards.
Das Sockelteil ist bevorzugt als Gehäuseteil ausgebildet. Damit kann es die Wärme direkt nach außen ableiten. Alternativ ist das Sockelteil vorzugsweise zumindest thermisch an ein Gehäuseteil angebunden.The base part is preferably designed as a housing part. This allows it to dissipate the heat directly to the outside. Alternatively, the base part is preferably at least thermally connected to a housing part.
Das Keilelement weist wärmeleitendes Material auf. Das Sockelteil weist bevorzugt wärmeleitendes Material auf. Dazu sind sie insbesondere aus Metall hergestellt. Es entsteht eine gute Wärmebrücke von dem elektrischen Bauteil nach außen.The wedge element comprises thermally conductive material. The base part preferably has a thermally conductive material. For this purpose, they are made in particular from metal. A good thermal bridge is created from the electrical component to the outside.
Das Keilelement liegt bevorzugt direkt auf dem Sockelteil auf. Es befinden sich also keine weiteren Bauteile dazwischen, insbesondere kein herkömmlich zum Ausgleich von Toleranzen vorzusehendes Wärmeleitpad. Das ist nicht erforderlich, weil das Keilelement dessen Aufgabe durch Einnehmen der gewünschten Position bereits erfüllt.The wedge element preferably rests directly on the base part. There are therefore no further components in between, in particular no heat conducting pad conventionally to be provided to compensate for tolerances. This is not necessary because the wedge element already fulfills its task by taking up the desired position.
Vorzugsweise wird wärmeleitendes Material zwischen dem elektrischen Bauteil und der zweiten Keilfläche angeordnet. Während die erste Keilfläche auf dem Sockelteil fixiert und auf diese Weise eine dichte Anbindung sichergestellt ist, kann wärmeleitendes Material an der Schnittstelle zwischen Keil und elektrischem Bauteil helfen, weitere Toleranzen auszugleichen, die thermische Anbindung nochmals zu verbessern und mechanische Belastungen des möglicherweise empfindlichen elektrischen Bauteils zu vermeiden. Dabei geht es aber nur noch um kleine Toleranzen und daher eine dünne Schicht des wärmeleitenden Materials, da der größere Anteil bereits durch den Keil ausgeglichen ist.Preferably, thermally conductive material is arranged between the electrical component and the second wedge surface. While the first wedge surface is fixed on the base part and a tight connection is ensured in this way, thermally conductive material at the interface between the wedge and electrical component can help to compensate for further tolerances, to further improve the thermal connection and to reduce mechanical loads on the possibly sensitive electrical component avoid. However, it is only a matter of small tolerances and therefore a thin layer of the thermally conductive material, as the greater proportion is already balanced out by the wedge.
Das erste Befestigungselement bildet vorzugsweise eine zu der Auflagefläche und der ersten Keilfläche senkrechte Verbindung. Es wird also für eine direkte, senkrechte Verbindung und Krafteinwirkung zwischen Keilelement und Sockelteil mit entsprechend gutem thermischem Übergang gesorgt. Das könnte die seitliche Kraft nicht leisten, sie hat nur eine Teilkomponente in dieser während der Lebenszeit des montierten Geräts wesentlichen Richtung. Eine einfache Realisierungsmöglichkeit ist ein selbst senkrecht orientiertes erstes Befestigungselement, insbesondere ein senkrechtes Verschrauben. Eine gewisse Schräglage beispielsweise zur besseren Zugänglichkeit mit einem Werkzeug ist aber noch möglich.The first fastening element preferably forms a connection perpendicular to the support surface and the first wedge surface. A direct, vertical connection and application of force between the wedge element and the base part with a correspondingly good thermal transition is therefore ensured. The lateral force could not do that, it only has a partial component in this direction, which is essential during the lifetime of the installed device. A simple implementation possibility is a first fastening element which is itself vertically oriented, in particular a vertical screwing. A certain incline, for example for better accessibility with a tool, is still possible.
Das elektrische Bauteil wird bevorzugt auf dem Sockelteil angeordnet, um während des Ausübens der seitlichen Kraft die gewünschte Position vorzugeben. Auf diese Weise gibt das elektrische Bauteil selbst, das in seine Zielposition gebracht wird, die gewünschte Position des Keilelements vor. Die seitliche Kraft drückt es unter Ausgleich der Toleranzen mit der zweiten Keilfläche nach oben bis an die Unterseite des elektrischen Bauteils oder, falls gewünscht, eines dazwischen noch angeordneten Wärmeleitmaterials. In dieser Position wird dann das Keilelement an dem Sockelteil fixiert. Vorzugsweise weist das elektrische Bauteil mindestens eine Öffnung auf, durch die hindurch das erste Befestigungselement fixiert wird. Alternativ kann das Keilelement seitliche Befestigungsbereiche aufweisen, die für ein Werkzeug zum Fixieren des ersten Befestigungselements zugänglich bleiben.The electrical component is preferably arranged on the base part in order to predetermine the desired position while the lateral force is being exerted. In this way, the electrical component itself, which is brought into its target position, specifies the desired position of the wedge element. The lateral force presses it upwards, compensating for the tolerances, with the second wedge surface up to the underside of the electrical component or, if desired, of a heat-conducting material arranged in between. In this position, the wedge element is then fixed on the base part. The electrical component preferably has at least one opening through which the first fastening element is fixed. Alternatively, the wedge element can have lateral fastening areas which remain accessible for a tool for fixing the first fastening element.
Vorzugsweise wird zunächst vor dem elektrischen Bauteil eine Schablone mit einer Geometrie entsprechend dem elektrischen Bauteil auf dem Sockelteil angeordnet, um während des Ausübens der seitlichen Kraft die gewünschte Position vorzugeben. Der Schablone schaden gewisse mechanische Belastungen während des Toleranzausgleichs mit der seitlichen Kraft und der Fixierung des Keilelements nicht, die ein elektrisches Bauteil wie eine bestückte Leiterplatte beeinträchtigen könnten. Außerdem kann die Schablone so ausgelegt sein, dass es einen einfachen Zugang für das Fixieren des ersten Befestigungselements gibt. Die Übereinstimmung der Geometrie der Schablone mit derjenigen des elektrischen Bauteils betrifft nur die Bereiche, die für die Auflage auf der zweiten Keilfläche und die Befestigung auf dem Sockelteil relevant sind, so dass ansonsten Freiheit besteht, Öffnungen und dergleichen für den Werkzeugzugang vorzusehen.Preferably, a template with a geometry corresponding to the electrical component is first arranged on the base part in front of the electrical component in order to predefine the desired position while the lateral force is being exerted. Certain mechanical loads damage the template during tolerance compensation with the lateral force and the fixation of the wedge element, which could affect an electrical component such as an assembled circuit board. In addition, the template can be designed such that there is easy access for fixing the first fastening element. The correspondence of the geometry of the template with that of the electrical component relates only to the areas that are relevant for the support on the second wedge surface and the attachment to the base part, so that otherwise there is freedom to provide openings and the like for tool access.
Die Schablone wird dann vorzugsweise entfernt, wenn das Keilelement mit dem ersten Befestigungselement an dem Sockelteil fixiert ist. Statt der Schablone wird das elektrische Bauteil mit mindestens einem zweiten Befestigungselement an dem Sockelteil fixiert, insbesondere verschraubt. Im Falle einer Leiterplatte liegen nun die bestückten elektrischen Komponenten auf der zweiten Keilfläche auf, wie dies mit der Schablone ausgemessen wurde, und so wird deren Abwärme durch das Keilelement in das Sockelteil und weiter nach außen abgeführt. Die Schablone kann einen definierten Abstand für ein Wärmeleitpad oder dergleichen zwischen dem elektrischen Bauteil und dem zweiten Keilelement berücksichtigen.The template is then preferably removed when the wedge element is fixed to the base part with the first fastening element. Instead of the template, the electrical component is fixed, in particular screwed, to the base part with at least one second fastening element. In the case of a printed circuit board, the fitted electrical components now rest on the second wedge surface, as measured with the template, and so their waste heat is dissipated through the wedge element into the base part and further to the outside. The template can take into account a defined distance for a heat conducting pad or the like between the electrical component and the second wedge element.
In bevorzugter Weiterbildung wird ein Verfahren zur Herstellung eines Sensors angegeben, bei dem mit einer der Ausführungsformen des erfindungsgemäßen Verfahrens mindestens ein elektrisches Bauteil auf mindestens einem Sockelteil montiert wird. Der Sensor ist bevorzugt ein optoelektronischer Sensor, insbesondere eine Kamera, die als Codeleser ausgebildet sein kann. Das elektrische Bauteil kann eine Leiterplatte mit einer Lichtquelle, einem Lichtempfänger oder Bildsensor und sonstigen elektronischen Komponenten für Datenaustausch, Versorgung oder Steuer- beziehungsweise Auswertungsfunktionen sein.In a preferred development, a method for producing a sensor is specified in which at least one electrical component is mounted on at least one base part with one of the embodiments of the method according to the invention. The sensor is preferably an optoelectronic sensor, in particular a camera, which can be designed as a code reader. The electrical component can be a circuit board with a light source, a light receiver or image sensor and other electronic components for data exchange, supply or control or evaluation functions.
Die Erfindung wird nachstehend auch hinsichtlich weiterer Merkmale und Vorteile beispielhaft anhand von Ausführungsformen und unter Bezug auf die beigefügte Zeichnung näher erläutert. Die Abbildungen der Zeichnung zeigen in:
- Fig. 1
- eine Schnittdarstellung eines Sockelteils mit schräger Auflagefläche;
- Fig. 2
- eine Schnittdarstellung des Sockelteils mit aufgelegter Schablone eines elektrischen Bauteils;
- Fig. 3
- eine Schnittdarstellung, bei der ein Metallkeil zwischen Sockelteil und Schablone eingeführt und mit einer seitlichen Kraft angedrückt wird;
- Fig. 4
- eine Schnittdarstellung, in welcher der Metallkeil in einer Zielposition fixiert wird;
- Fig. 5
- eine Schnittdarstellung, bei der nach der Fixierung die seitliche Kraft nicht mehr ausgeübt und die Schablone entfernt wird; und
- Fig. 6
- eine Schnittdarstellung, in der das elektrisches Bauteil anstelle der Schablone aufgelegt und an dem Sockelteil befestigt wird.
- Fig. 1
- a sectional view of a base part with an inclined support surface;
- Fig. 2
- a sectional view of the base part with an applied template of an electrical component;
- Fig. 3
- a sectional view in which a metal wedge is inserted between the base part and template and pressed on with a lateral force;
- Fig. 4
- a sectional view in which the metal wedge is fixed in a target position;
- Fig. 5
- a sectional view in which, after fixation, the lateral force is no longer exerted and the template is removed; and
- Fig. 6
- a sectional view in which the electrical component is placed in place of the template and attached to the base part.
Das Sockelteil 10 hat eine Öffnung 12 für ein erstes Befestigungselement, wobei je nach Abmessungen auch mehrere Öffnungen 12 für mehrere erste Befestigungselemente möglich sind. Ferner sind zweite Befestigungselemente 14 für das elektrische Bauteil vorgesehen. Auf der Oberseite, wo das elektrische Bauteil montiert wird, weist das Sockelteil 10 eine schräge Auflagefläche 16 auf. Bei glatter, horizontaler Oberseite würde das elektrische Bauteil darauf nur mit großer mechanischer Toleranz montiert, die erfindungsgemäß durch die schräge Auflagefläche 16 und die weiteren, nachfolgend unter Bezugnahme auf die
Zwischen dem elektrischen Bauteil 24 und dem Keilelement 20 ist vorzugsweise noch wärmeleitendes Material 26 angeordnet, beispielsweise ein Temperaturpad oder eine Wärmeleitpaste oder beides, wie eine Polyimid-Folie mit Paste. Damit können verbleibende Toleranzen des elektrischen Bauteils 24 beziehungsweise der Leiterplatte und deren Bestückung ausgeglichen werden. Eine typische Ausdehnung des wärmeleitenden Materials 26 kann in dem Materialblock 18a der Schablone 18 berücksichtigt sein.Between the
Alternativ zu einer Höhenanpassung mittels Schablone 18 kann auch im zu
Claims (9)
- A method of mounting an electrical component (24) on a base part (10) having an inclined support surface (16) for a compensation of mechanical tolerances and an improved thermal connection of the component (24), wherein a first wedge surface of a wedge element (20) made of metal or another thermally conductive material is arranged on the support surface (16), and a lateral force (F) is exerted on the wedge element (20) from the narrow side of the wedge element (20), so that the first wedge surface moves on the support surface (16) until a second wedge surface of the wedge element (20) remote from the support surface (16) reaches a desired position, and wherein the electrical component (24) is arranged on the second wedge surface,
characterized in that the wedge element (20) is fixed to the base part (10) and held in the desired position using a first fastening element (22), in particular a screw, and the lateral force (F) from the narrow side of the wedge element (20) is afterwards no longer exerted, thus means for exerting the lateral force and reaching the desired position are only necessary during assembly and then no longer. - The method in accordance with claim 1,
wherein the electrical component (24) has a circuit board and/or the base part (10) is configured as a housing part. - The method in accordance with claim 1 or 2,
wherein the wedge element (20) and/or the base part (10) comprises thermally conductive material. - The method in accordance with any of the preceding claims,
wherein the wedge element (20) lies directly on the base part (10). - The method in accordance with any of the preceding claims,
wherein thermally conductive material (26) is arranged between the electrical component (24) and the second wedge surface. - The method in accordance with any of the preceding claims,
wherein the first fastening element (22) is oriented perpendicular to the support surface (16) and the first wedge surface. - The method in accordance with any of the preceding claims,
wherein the electrical component (24) is arranged on the base part (10) to predefine the desired position during the exertion of the lateral force (F). - The method in accordance with any of the preceding claims,
wherein a template (18) having a geometry corresponding to the electrical component (24) is arranged before the electrical component (24) on the base part (10) to predefine the desired position during the exertion of the lateral force (F), and wherein in particular the template (18) is removed once the wedge element (20) is fixed to the base part (10) using the first fastening element (20). - A method of manufacturing a sensor, wherein at least one electrical component (24) is mounted on at least one base part (10) using a method according to any of the preceding claims.
Applications Claiming Priority (1)
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DE102018117695.3A DE102018117695B3 (en) | 2018-07-23 | 2018-07-23 | Method for mounting an electrical component on a base part |
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EP3599806A1 EP3599806A1 (en) | 2020-01-29 |
EP3599806B1 true EP3599806B1 (en) | 2020-12-30 |
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EP19183152.8A Active EP3599806B1 (en) | 2018-07-23 | 2019-06-28 | Method for mounting an electrical component on a base part |
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US (1) | US10971639B2 (en) |
EP (1) | EP3599806B1 (en) |
DE (1) | DE102018117695B3 (en) |
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Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
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US20130003316A1 (en) * | 2010-12-28 | 2013-01-03 | Elma Electronic Inc. | Card Lock Retainer For Pluggable Conduction Cooled Circuit Card Assemblies |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
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DE8711779U1 (en) * | 1987-08-31 | 1987-11-19 | Siemens AG, 1000 Berlin und 8000 München | Heat conductors for components in electrical communications engineering |
US5472353A (en) | 1995-04-13 | 1995-12-05 | Hristake; Val | Isobaric expandable thermal clamp for printed circuit board |
US6985359B2 (en) * | 2003-04-21 | 2006-01-10 | Hewlett-Packard Development Company, L.P. | Variable-wedge thermal-interface device |
US7120023B2 (en) * | 2003-08-25 | 2006-10-10 | Hewlett-Packard Development Company, L.P. | Method of assembly of a wedge thermal interface to allow expansion after assembly |
DE102006037747B4 (en) * | 2006-08-11 | 2009-06-04 | Nokia Siemens Networks Gmbh & Co.Kg | Arrangement for cooling an electrical component |
DE102007049035B4 (en) * | 2007-10-11 | 2011-01-13 | GE Fanuc Intelligent Platforms Embedded Systems, Inc. (n.d.Ges.d. Staates Delaware) | Chip cooling device with wedge element |
US9068784B2 (en) * | 2012-11-15 | 2015-06-30 | International Business Machines Corporation | Cooling system for electronics |
TWI564535B (en) | 2015-02-16 | 2017-01-01 | 國立清華大學 | Rapidly removable thermal connector |
US10054375B2 (en) | 2016-06-15 | 2018-08-21 | Mellanox Technologies, Ltd. | Self-adjusting cooling module |
-
2018
- 2018-07-23 DE DE102018117695.3A patent/DE102018117695B3/en not_active Expired - Fee Related
-
2019
- 2019-06-28 EP EP19183152.8A patent/EP3599806B1/en active Active
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Publication number | Priority date | Publication date | Assignee | Title |
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US20130003316A1 (en) * | 2010-12-28 | 2013-01-03 | Elma Electronic Inc. | Card Lock Retainer For Pluggable Conduction Cooled Circuit Card Assemblies |
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DK3599806T3 (en) | 2021-03-01 |
EP3599806A1 (en) | 2020-01-29 |
US20200027998A1 (en) | 2020-01-23 |
US10971639B2 (en) | 2021-04-06 |
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